Priming mixture



Patented Oct. 28, 1930 I i JOSEPH D. MCNUTT, OF NEW HAVEN, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO WINCHESTER REPEATING ARMS COMPANY, OF NEW HAVEN, CONNECT- ICUT, A CORPORATION OF DELAWARE Jermaine MIXTURE No Drawing. Application filed December 24, 1927. Serial No. 242,523.

My invention relates to an improvement in 2. A priming mixture, comprising 20% to priming mixtures, the objects being to pro- 40% of lead peroxid, 3% to barium niduce a priming mixture of such a character trate, 30% to 45% of mercury fulminate, 3% that it will leave no corrosive residuum. to pentaerythritetetranitrate, and 15% 5 With these ends in View, my invention conto 25% ground glass.

sists in a priming mixture characterized by In testimony whereof I aflix my signature. the employment, as its chief oxygen-supply- JOSEPH D. MGNUTT. ing elements, of a metallic peroxid and a metallic nitrate; as its principal fuel elein ment, a nitrated organic compound; and as its detonating element, a metallic fulminate.

In carrying out my invention, I preferably employ, dependent upon the commercial strength of the ingredients, substantially 35 3045% mercury fulminate (dry weight), -40% lead peroxid, 310% barium nitrate, 315% pentaerythritetetranitrate, 15-25% ground glass, though these proportions may be varied as may be necessary td meet the 530 requirements of various uses of the ultimate mixture.

In proceeding to make my improved priming mixture, the lead peroxid, barium nitrate, pentaerythritetetranitrate and ground glass are weighed out, sifted and mixed dry. A

small portion of a solution of gum is now added and mixed in. The fulminate in a dampened state is then Weighed out and added to the above mixture, andthe whole after being thoroughly mixed, is then used in the ordinary manner of such priming mixtures. I also find that I may use other heavy metal oxide or salts, such as barium dioxid or lead chromate, in place of the lead eroxid or bariumrnitrate. Also I ma su stitute trinitroresorcinol, or other suita le nitrated organic substance, in whole or in part, for the pentaerythritetetranitrate. Such substitution's, in whole or in part, fall within the 40 scope of my invention.

I claim: 1. A priming mixture, comprising 20% to 40% of lead peroxid, 3% to 10% barium nitrate, 30% to of mercury fulminate,

45 and 3% to 15% pentaerythritetetranitrate. 

